CN106013157B - A kind of device in jet mixing filling Coarse Aggregate dam body gap - Google Patents

Abstract

The invention discloses a device for filling the gap of a coarse-grained dam body with jet flow stirring, and sand materials (8) are stacked around it, and the feature is that the upper and lower ends of the main shaft (1) are connected with the drill pipe through threads The body (2) is threaded; the four auxiliary stirring arms (3) are cross-shaped welded on the shaft arm of the main shaft (1) with a cavity structure inside, and the auxiliary stirring arms (3) are font, a vertical grouting hole (4) is opened in the middle of the horizontal arm (3.1) of each auxiliary stirring arm (3), and the vertical arm (3.2) of each auxiliary stirring arm (3) is a solid structure, and The tail of the vertical arm (3.2) shrinks inward; it overcomes the disadvantages of difficult control of the slurry diffusion radius and large slurry consumption in the prior art of injecting thick slurry through the drill pipe, and has a higher stirring filling efficiency than that of pouring through the inner cavity of the drill pipe. Fluid mortar provides more than 35% advantages.

Description

A jet stirring device for filling the voids of a coarse-grained material dam body

technical field

The invention relates to the technical field of strengthening the dam body of dangerous granular materials in water conservancy and hydropower projects, and more specifically relates to a device for filling the gaps of the coarse-grained material dam body with jet stirring.

Background technique

During the special historical period from the 1950s to the 1970s in my country, the dam bodies of coarse-grained dams such as gravel dams, sand pebble dams, and rockfill dams were limited by the construction technology level at that time, and some dams were not compacted due to rolling. , the porosity is large, which leads to large deformation of the dam body, and long-term non-convergence, which eventually leads to the destruction of the anti-seepage system. The damage of the anti-seepage system caused by the deformation of the dam body needs to be reinforced by engineering measures or the natural deformation of the dam body is stabilized before the anti-seepage system is repaired.

Filling and grouting is an effective method to reduce the voids of the coarse-grained sand dam body, thereby reducing the porosity of the dam body and controlling the deformation of the dam body. However, for coarse-grained dams with many voids and large porosity, the current engineering reinforcement measures are mostly direct injection of thick slurry through drill pipes or injection of fluid mortar through drill pipes. The diffusion radius of slurry is difficult to control due to the difficulty of injecting thick slurry through drill pipes There are many problems such as large slurry consumption and low injection efficiency; however, when injecting fluid mortar and other coarse-grained materials through drill pipes, the injection efficiency is low, and the gaps in the dam body are filled unevenly, which easily leads to blockage of drill pipes.

Contents of the invention

The purpose of the present invention is to overcome the disadvantages in the above-mentioned background technology, and propose a device for filling the voids of the coarse grain material dam body with jet agitation.

The present invention is a device for jet stirring and filling the gap of coarse-grained material dam body, and sand materials are stacked around it,

It is characterized in that it includes a main shaft, a threaded connection body, an auxiliary stirring arm, a vertical grouting hole, a horizontal grouting hole, and a closing plate; the upper and lower ends of the main shaft are threaded with the drill pipe through the threaded connection body; The four auxiliary stirring arms are welded in a cross shape on the horizontal plane to the shaft arm of the main shaft with a cavity structure inside, and the auxiliary stirring arms are font, there is a vertical grouting hole in the middle of the horizontal arm of each of the auxiliary stirring arms, the vertical arm of each of the auxiliary stirring arms is a solid structure, and the tail of the vertical arm shrinks inward; Four horizontal injection holes are arranged at 30 mm below the middle of the main shaft, and the four horizontal injection holes are equally spaced and circumferentially arranged on the main shaft; in the cavity of the main shaft The tail is provided with a closing plate, which forms a closed structure with the threaded connection body at the lower end, and a closing plate grouting hole is opened in the middle of the closing plate.

In the above technical scheme: the diameter of the main shaft is 50 mm, and the length is 250 mm; the length of the horizontal arm is 150 mm, and the length of the vertical arm is 60 mm; Both the holes and the horizontal shot holes have a diameter of 5 mm.

In the above technical solution: the angle between the horizontal arm and the horizontal arm is 45 degrees.

In the above technical solution: the closing plate is made of steel material, and the diameter of the grouting hole of the closing plate is 5 mm.

The invention has the following advantages: 1. The device can uniformly mix the sand material at the orifice and the cement slurry, and the mortar can fill the cavity of the rockfill body continuously, stably and efficiently. 2. This device has been successfully applied in a rockfill dam reinforcement project of a certain project. It has realized the uniform filling of the grouting material in the rockfill dam body, and has suitable cementation strength, which makes up for the filling quality defects of the original dam body. 3. The stirring and filling efficiency is more than 35% higher than that of pouring fluid mortar through the inner cavity of the drill pipe. 4. According to the detection of uniform distribution of filling materials in the dam body, the voids in the dam body are filled efficiently and the porosity is effectively controlled.

Description of drawings

Fig. 1 is a cross-sectional view of a coarse-grained dam body gap filling device of the present invention.

Fig. 2 is a top view of the coarse-grained material dam void filling device of the present invention.

In the figure: main shaft 1, threaded connection body 2, auxiliary stirring arm 3, horizontal arm 3.1, vertical arm 3.2, vertical shot hole 4, horizontal shot hole 5, closed plate 6, closed plate shot hole 7, sand material 8.

Detailed ways

The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation to the present invention, they are only examples, and the advantages of the present invention will become clearer and easier to understand.

Shown with reference to Fig. 1-2: a kind of jet agitation of the present invention fills the device of coarse-grained material dam body gap, is piled up with sand material 8 around it,

It is characterized in that it includes a main shaft 1, a threaded connection body 2, an auxiliary stirring arm 3, a vertical grouting hole 4, a horizontal grouting hole 5, and a closing plate 6; the upper and lower ends of the main shaft 1 are connected to the drill pipe Through the threaded connection body 2 threaded connection; the four auxiliary stirring arms 3 are welded in a cross shape on the horizontal plane on the shaft arm of the main shaft 1 with a cavity structure inside, and the auxiliary stirring arms 3 are in the shape of font, there is a vertical grouting hole 4 in the middle of the horizontal arm 3.1 of each auxiliary stirring arm 3, the vertical arm 3.2 of each auxiliary stirring arm 3 is a solid structure, and the vertical arm 3.2 The tail shrinks inward; four horizontal injection holes 5 are arranged 30 mm below the middle of the main shaft 1, and the four horizontal injection holes 5 are equidistantly arranged on the main shaft 1; A closed plate 6 is arranged at the tail of the cavity of the main shaft 1, and the closed structure is formed between the closed plate 6 and the threaded connection body 2 at the lower end, and a closed plate shot is opened in the middle of the closed plate 6. pulp hole 7.

The diameter of described main shaft 1 is 50 millimeters, and length is 250 millimeters; The length of described horizontal arm 3.1 is 150 millimeters, and the length of described vertical arm 3.2 is 60 millimeters; Each described vertical grouting hole 4 and The aperture of horizontal grouting hole 5 is 5 millimeters.

The included angle between the horizontal arm 3.1 and the line connecting the horizontal grouting hole 5 and the axis of the main shaft 1 is 45 degrees (the angle a in the figure is 45 degrees).

The closing plate 6 is made of steel material, and the diameter of the grouting hole 7 of the closing plate is 5 mm.

The specific flow-through process of the mortar slurry in the present invention is as follows; the present invention is installed in the drill pipe, that is, a part of the drill pipe is replaced. The pressed cement slurry flows through the axial tube of the main shaft 1 to the lowermost closing plate 6, and a small amount of cement slurry flows from the closing plate grouting hole 7 on the closing plate 6 to the drill pipe below to wet the drill hole. The grouting hole 7 of the closed plate is small, which does not reduce the pressure of the cement slurry. The cement slurry under pressure is sprayed into the sand material 8 through the horizontal grouting hole 5 and the vertical grouting hole 4. Since the device is synchronized with the drill pipe Rotate, the cement slurry stirs the mortar along with the drill pipe.

Another part of the mortar slurry to be grouted flows from the annular pipe of the main shaft 1 to the vertical shot hole 4 on the auxiliary stirring arm 3 and the horizontal shot hole 5 on the main shaft 1, because in the Sand materials 8 are piled up near the auxiliary stirring arms 3, and the cement slurry is ejected from the vertical grout holes 4 and the horizontal grout holes 5, and sprayed onto the sand materials 8. At this time, the four auxiliary stirring arms 3 rotate to The mortar and sand material 8 are fully mixed, and flow to the dam body to be repaired by the flow channel (marked by the arrow in the figure) on the outer wall of the main shaft 1 .

The parts not described in detail above are all prior art.

Claims (4)

1. a kind of device in jet mixing filling Coarse Aggregate dam body gap, it is characterised in that：It further includes main shaft (1), be threadedly coupled Body (2), auxiliary mixing arm (3), it is vertical penetrate slurry hole (4), level penetrates slurry hole (5), closed plate (6)；In the upper of the main shaft (1) Lower both ends are connected through a screw thread body (2) with drilling rod and are threadedly coupled；Auxiliary mixing arm (3) described in four is in ten in the horizontal plane Font is welded on the internal armshaft for the main shaft (1) of cavity structure, in the horizontal arm of each auxiliary mixing arm (3) (3.1) centre is provided with vertical penetrate and starches hole (4), horizontal arm (3.1) cavity and the perforation of main shaft (1) cavity, each auxiliary The upright arm (3.2) of mixing arm (3) is solid construction, and the tail portion of upright arm (3.2) is to contract；In the main shaft (1) Middle lower section setting to be penetrated there are four level starches hole (5), and it is equidistantly circumferentially disposed in the master that the level described in four penetrates slurry hole (5) On axis (1)；Tail portion in the cavity of the main shaft (1) is provided with closed plate (6), the closed plate (6) and lower end It is threadedly coupled body (2) and forms enclosed construction, and be provided with closed plate in the centre of the closed plate (6) and penetrate slurry hole (7).

2. a kind of device in jet mixing filling Coarse Aggregate dam body gap according to claim 1, it is characterised in that：It is described A diameter of 50 millimeters of main shaft (1), length is 250 millimeters；150 millimeters of the length of the horizontal arm (3.1), described hangs down Straight-arm (3.2) length is 60 millimeters；It is each described vertical to penetrate slurry hole (4) and level penetrates that starch the aperture of hole (5) be 5 millimeters.

3. a kind of device in jet mixing filling Coarse Aggregate dam body gap according to claim 1 or 2, it is characterised in that： The angle that the level is penetrated between slurry hole (5) and the line in axle center and horizontal arm (3.1) of main shaft (1) is 45 degree.

4. a kind of device in jet mixing filling Coarse Aggregate dam body gap according to claim 3, it is characterised in that：It is described Closed plate (6) be made for steel material, and the closed plate penetrate slurry hole (7) aperture be 5 millimeters.